Knowledge quiz

It's time to put what you've learned to the test, get 8 right to pass this week.

Which of the following is an example of a ledger?

Choose the correct answer.

The signing book for guests visiting a building

The lord of the rings (books) trilogy

A company's annual report (financial report)

The search results when searching on Wikipedia

What is the single best way to reduce Bitcoin's carbon footprint?

Choose the correct answer.

Augment green energy in the grid.

Restrict who can run the nodes of Bitcoin.

Deploy a new version of Bitcoins.

Change the "guessing game" of Bitcoin to make it easier.

Which of the following are advantages of blockchain in humanitarian aid?

There are three correct answers.

High compliance using on-chain contracts

End-to-end transparency

Bank-less financial inclusion

High conversation costs

Full privacy & anonymity

What role does the chain itself fulfill in a blockchain?

Choose the correct answer.

It ensures that the history of the blockchain cannot be modified, because each block is linked to its predecessor.

It offers a degree of encryption that cannot be cracked.

It establishes a gate to the data that can only be opened with the correct password.

It enables you to identify the sequence of the blocks thanks to its encryption.

What does the word immutable mean?

There are two correct answers.

Once it is there, it can never be deleted.

It can be used as a source of absolute trust since it is impossible to modify.

There is extremely secure access control around the data.

Viruses are incapable of creating mutations of the program.

Which of the following consumes by far the most energy per transaction?

Choose the correct answer.

Bitcoin

XRP Ripple

Visa

Ethereum

What does a private blockchain guarantee?

Choose the correct answer.

It cannot provide any absolute guarantees.

It guarantees immutability.

It guarantees unrestricted access for everybody.

It guarantees the new "source of trust alternative".

What is the act of borrowing cryptocurrency on a blockchain called?

Choose the correct answer.

DeFi

dApp

Smart contract

NFT

Blockchain works by collecting data and offering an everlasting trace. What kind of a trace is this?

Choose the correct answer.

Instead of the data itself, a hash is used as a "fingerprint" of the data.

The blockchain is updated with the original data and a reference to the owner.

The trace is made up of the blocks. To safeguard the data, they are encrypted.

A secure chain that is impenetrable serves as a representation of the data.

10.

Is it possible to convert a fingerprint( hash) back to the original data ?

Choose the correct answer.

No, it is not possible because the calculation includes a random number.

No, it is not possible, it is a one way encryption only.

Yes, it is possible if you use a quantum computer.

Yes, you can do it if you know at least half of the hash.